Technologies

Mars snow is dusty, and might even melt into liquid water

Dusty, dark Mars ice could suck up solar energy and maybe even get a little melty.

This story is part of Welcome to Mars, our series exploring the red planet.

Back in 2008, NASA made a big announcement that its Phoenix lander had confirmed water ice near the surface of Mars. A team of researchers has taken a new look at what Phoenix found, combined it with data from NASA’s Mars Reconnaissance Orbiter, and used computer simulations to better understand the dustiness of the ice and what that can tell us about Mars’ climate history.

Not surprisingly, Mars snow has dust mixed into it. «The dustier the ice is, the darker and thus warmer the ice gets, which can affect both its stability and evolution through time,» Arizona State University said in a statement last week. «Under certain conditions, this might also mean that the ice could melt on Mars.»

The team’s paper on the Martian ice has been accepted for publication in the Journal of Geophysical Research: Planets.

«There is a chance that this dusty and dark ice might melt a few centimeters down,» said planetary scientist Aditya Khuller, lead author of the paper. «And any subsurface liquid water produced from melting will be protected from evaporating in Mars’ wispy atmosphere by the overlying blanket of ice.»

The research points to the ice investigated by Phoenix coming from dusty snowfall sometime over the last million years. It will require further work to determine if the ice might actually melt into liquid water, but it’s an intriguing idea.

Understanding water on Mars is key to understanding the chances the red planet might have once hosted microbial life. Current-day Mars is dry, dusty and very cold, which makes it pretty inhospitable, though a study earlier this year suggested Earth microbes might be able to survive on Mars temporarily.

Ice on Mars could also be important for future human visitors who will need water resources. In 2019, NASA released a «treasure map» of water ice that could potentially be reached by astronauts.

The history of water on Mars is complex and often mysterious. Some recent studies had suggested there might be hidden briny lakes at the planet’s south pole, but newer evidence argues they might actually be frozen clays. NASA’s Perseverance rover is currently checking out a former lakebed in the Jezero Crater in a search for signs of ancient microbial life.

The new study on Martian snow and its dustiness gives scientists one more piece to place into the larger puzzle of Mars water. Could there be pockets of puddles on Mars? Perhaps. You might want to pack a straw just in case.

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Technologies

Ultrahuman Ring Pro Brings Better Battery Life, More Action and Analysis

The company’s new flagship smart ring stores more data, too. But that doesn’t really help Americans.

Sick of your smart ring’s battery not holding up? Ultrahuman’s new $479 Ring Pro smart ring, unveiled on Friday, offers up to 15 days of battery life on a single charge. The Ring Pro joins the company’s $349 Ring Air, which boosts health tracking, thanks to longer battery life, increased data storage, improved speed and accuracy and a new heart-rate sensing architecture. The ring works in conjunction with the latest Pro charging case.

Ultrahuman also launched its Jade AI, which can act as an agent based on analysis of current and historical health data. Jade can synthesize data from across the company’s products and is compatible with its Rings.

«With industry-leading hardware paired with Jade biointelligence AI, users can now take real-time actionable interventions towards their health than ever before,» said Mohit Kumar, CEO of Ultrahuman.

No US sales

That hardware isn’t available in the US, though, thanks to the ongoing ban on Ultrahuman’s Rings sales here, stemming from a patent dispute with its competitor, Oura Ring. It’s available for preorder now everywhere else and is slated to ship in March. Jade’s available globally.

Ultrahuman says the Ring Pro boosts battery life to about 15 days in Chill mode — up to 12 days in Turbo — compared to a maximum of six days for the Air. The Pro charger’s battery stores enough for another 45 days, which you top off with Qi-compatible wireless charging. In addition, the case incorporates locator technology via the app and a speaker, as well as usability features such as haptic notifications and a power LED.

The ring can also retain up to 250 days of data versus less than a week for the cheaper model. Ultrahuman redesigned the heart-rate sensor for better signal quality. An upgraded processor improves the accuracy of the local machine learning and overall speed.

It’s offered in gold, silver, black and titanium finishes, with available sizes ranging from 5 to 14.

Jade’s Deep Research Mode is the cross-ecosystem analysis feature, which aggregates data from Ring and Blood Vision and the company’s subscription services, Home and M1 CGM, to provide historical trends, offer current recommendations and flag potential issues, as well as trigger activities such as A-fib detection. Ultrahuman plans to expand its capabilities to include health-adjacent activities, such as ordering food.

Some new apps are also available for the company’s PowerPlug add-on platform, including capabilities such as tracking GLP-1 effects, snoring and respiratory analysis and migraine management tools.

Technologies

The FCC Just Approved Charter’s $34.5B Cox Purchase. Here’s What It Means for 37M Customers

Technologies

Spotify Expands Into Audiobook Rankings With Weekly Charts

The feature is available to both free users and Premium subscribers. Wuthering Heights is reaching the heights on both the US and UK charts.

If you’re a Spotify user, you may be familiar with features like the year-end summary Wrapped, as well as your daily usage stats. Now, the service has a new popularity chart tracking audiobooks.

Spotify’s audiobook charts are now available to free and Premium users within the service’s Audiobooks hub. While only Premium users receive 15 hours of audiobook listening per month, the company offers a larger selection of titles you can buy.

US charts and UK charts are both available now.

Read more: Best Music Streaming Services for 2026

Spotify says that the audiobook charts will help customers discover new and popular titles in real time.

«As we’ve proven with Music and Podcasts Charts, when content is easier to access, discover, and enjoy, the demand grows,» said Duncan Bruce, Spotify’s director of audiobook partnerships and licensing, in a statement on Friday.

Spotify launched audiobooks in 2022, and has since added features such as the AI catchup tool Recaps and PageMatch, which lets you swap more easily between a printed book and the audio version.

Spotify Premium currently costs $13 a month and includes more than 100 million songs, as well as audiobooks. Spotify Premium is currently CNET’s Editors’ Choice for best music streaming service.

The current US audiobooks chart lists Emily Brontë’s romantic classic Wuthering Heights as the top listen, followed by James Clear’s self-help book Atomic Habits and Freida McFadden’s psychological thriller The Housemaid. Audiobook popularity is also broken down by genre, with charts for romance, mystery and thriller books, self-help, science fiction and fantasy, biography and memoir, business and careers, teen and young adult, religion and spirituality, history, and parenting and relationships.

Powered by its blockbuster movie adaptation starring Margot Robbie and Jacob Elordi, Wuthering Heights also leads the overall chart for the UK.